Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings

Britton, Daniel; Penney, David; Malla, Amar; Mehraban, Shahin; Sullivan, James; Goldsworthy, Mathew; McGettrick, James; Johnston, Richard; Mitchell, Ria; Challinor, Clive

doi:10.1038/s41529-024-00481-7

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Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings

Daniel Britton, David Penney

, Amar Malla

, Shahin Mehraban, James Sullivan

, Mathew Goldsworthy, James McGettrick, Richard Johnston

, Ria Mitchell

, Clive Challinor

npj Materials Degradation, Volume: 8, Issue: 1

Swansea University Authors: Daniel Britton, David Penney , Amar Malla , Shahin Mehraban, James Sullivan , Mathew Goldsworthy, Richard Johnston , Ria Mitchell

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DOI (Published version): 10.1038/s41529-024-00481-7

Abstract

Microscopy, electrochemical techniques and mechanical testing are used to investigate the effect of varying antimony additions (0.45–1.8 wt%) on the microstructure and corrosion properties of zinc-magnesium-aluminium coating alloys. Samples were produced by splat casting to produce high cooling rate...

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Published in:	npj Materials Degradation
ISSN:	2397-2106
Published:	Springer Science and Business Media LLC 2024
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa66612
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spelling	v2 66612 2024-06-07 Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings 09da4807d902e139e89b80e6cd3e8fd5 Daniel Britton Daniel Britton true false 869becc35438853f2bca0044df467631 0000-0002-8942-8067 David Penney David Penney true false 51d0d611e98814e99679d9bb21836e3d 0000-0002-9133-7615 Amar Malla Amar Malla true false c7e4a4152b2cf403da129be7d1c2904d Shahin Mehraban Shahin Mehraban true false 40e32d66748ab74184a31207ab145708 0000-0003-1018-773X James Sullivan James Sullivan true false 4c93abf2275ffe2ba4d869920439f9bb Mathew Goldsworthy Mathew Goldsworthy true false 23282e7acce87dd926b8a62ae410a393 0000-0003-1977-6418 Richard Johnston Richard Johnston true false fcfffafbafb0036c483338f839df45e5 0000-0002-6328-3998 Ria Mitchell Ria Mitchell true false 2024-06-07 Microscopy, electrochemical techniques and mechanical testing are used to investigate the effect of varying antimony additions (0.45–1.8 wt%) on the microstructure and corrosion properties of zinc-magnesium-aluminium coating alloys. Samples were produced by splat casting to produce high cooling rates similar to those seen in a continuous galvanising line. X-Ray Microscopy reveals that the Sb additions produce disk-shaped Mg3Sb2 intermetallics, subsequently reducing or eliminating the MgZn2 eutectic. Electrochemical testing in 1 wt% NaCl shows that the Mg3Sb2 phase is cathodic with respect to the bulk alloy with slower oxygen reduction kinetics. The decrease in eutectic content leads to less intense anodic activity. The combined effect is anodic and cathodic deactivation, which leads to a 43% reduction in corrosion rate as measured through LPR compared to the base alloy. This work shows that quaternary additions to ZMA coating alloys can be a potential route to improved corrosion resistance for galvanic protection. Journal Article npj Materials Degradation 8 1 Springer Science and Business Media LLC 2397-2106 Characterization and analytical techniques, Metals and alloys, Scanning electron microscopy 7 6 2024 2024-06-07 10.1038/s41529-024-00481-7 http://dx.doi.org/10.1038/s41529-024-00481-7 COLLEGE NANME COLLEGE CODE Swansea University External research funder(s) paid the OA fee (includes OA grants disbursed by the Library) We would like to thank both EPSRC (EP/S02252X/1) and Tata Steel for their funding to the COATED Centre for Doctoral Training, as well as Swansea University’s AIM facility, the SPECIFIC Pilot Manufacturing Research Centre and the MACH1 project. 2024-11-04T11:53:06.8886078 2024-06-07T16:13:00.1664135 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Daniel Britton 1 David Penney 0000-0002-8942-8067 2 Amar Malla 0000-0002-9133-7615 3 Shahin Mehraban 4 James Sullivan 0000-0003-1018-773X 5 Mathew Goldsworthy 6 James McGettrick 7 Richard Johnston 0000-0003-1977-6418 8 Ria Mitchell 0000-0002-6328-3998 9 Clive Challinor 10 66612__30605__e33d7abade374b0aaa523ee1a2e64892.pdf 66612.vor.pdf 2024-06-11T16:02:33.1933355 Output 11519521 application/pdf Version of Record true This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. true eng http://creativecommons.org/licenses/by/4.0/
title	Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings
spellingShingle	Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings Daniel Britton David Penney Amar Malla Shahin Mehraban James Sullivan Mathew Goldsworthy Richard Johnston Ria Mitchell
title_short	Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings
title_full	Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings
title_fullStr	Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings
title_full_unstemmed	Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings
title_sort	Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings
author_id_str_mv	09da4807d902e139e89b80e6cd3e8fd5 869becc35438853f2bca0044df467631 51d0d611e98814e99679d9bb21836e3d c7e4a4152b2cf403da129be7d1c2904d 40e32d66748ab74184a31207ab145708 4c93abf2275ffe2ba4d869920439f9bb 23282e7acce87dd926b8a62ae410a393 fcfffafbafb0036c483338f839df45e5
author_id_fullname_str_mv	09da4807d902e139e89b80e6cd3e8fd5_*_Daniel Britton 869becc35438853f2bca0044df467631__David Penney 51d0d611e98814e99679d9bb21836e3d__Amar Malla c7e4a4152b2cf403da129be7d1c2904d__Shahin Mehraban 40e32d66748ab74184a31207ab145708__James Sullivan 4c93abf2275ffe2ba4d869920439f9bb__Mathew Goldsworthy 23282e7acce87dd926b8a62ae410a393__Richard Johnston fcfffafbafb0036c483338f839df45e5_*_Ria Mitchell
author	Daniel Britton David Penney Amar Malla Shahin Mehraban James Sullivan Mathew Goldsworthy Richard Johnston Ria Mitchell
author2	Daniel Britton David Penney Amar Malla Shahin Mehraban James Sullivan Mathew Goldsworthy James McGettrick Richard Johnston Ria Mitchell Clive Challinor
format	Journal article
container_title	npj Materials Degradation
container_volume	8
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publishDate	2024
institution	Swansea University
issn	2397-2106
doi_str_mv	10.1038/s41529-024-00481-7
publisher	Springer Science and Business Media LLC
college_str	Faculty of Science and Engineering
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department_str	School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
url	http://dx.doi.org/10.1038/s41529-024-00481-7
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description	Microscopy, electrochemical techniques and mechanical testing are used to investigate the effect of varying antimony additions (0.45–1.8 wt%) on the microstructure and corrosion properties of zinc-magnesium-aluminium coating alloys. Samples were produced by splat casting to produce high cooling rates similar to those seen in a continuous galvanising line. X-Ray Microscopy reveals that the Sb additions produce disk-shaped Mg3Sb2 intermetallics, subsequently reducing or eliminating the MgZn2 eutectic. Electrochemical testing in 1 wt% NaCl shows that the Mg3Sb2 phase is cathodic with respect to the bulk alloy with slower oxygen reduction kinetics. The decrease in eutectic content leads to less intense anodic activity. The combined effect is anodic and cathodic deactivation, which leads to a 43% reduction in corrosion rate as measured through LPR compared to the base alloy. This work shows that quaternary additions to ZMA coating alloys can be a potential route to improved corrosion resistance for galvanic protection.
published_date	2024-06-07T11:53:05Z
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score	11.037319

Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings

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